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Forum: Service Manuals, Requests, Repair Tips

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  1. Sticky Thread Sticky: READ BEFORE YOU POST - do not post e-books, ieee papers here

    Started by pranam77, 29th August 2009 08:34
    • Replies: 0
    • Views: 21,924
    pranam77
    29th August 2009, 08:34 Go to last post

  1. Microtek 3KVa inverter

    Started by Mlungu, Yesterday 11:42
    1 Attachment(s)
    • Replies: 0
    • Views: 76
    Mlungu
    Yesterday, 11:42 Go to last post

  2. 24VDC Single LED Flasher Circuit

    Started by imranahmed, 11th September 2019 11:28
    1 Attachment(s)
    • Replies: 5
    • Views: 289
    schmitt trigger
    12th September 2019, 13:59 Go to last post

  3. please help to identify component with marking BEQX with Japanese writing.

    Started by debugtimog, 12th September 2019 06:42
    2 Attachment(s)
    • Replies: 1
    • Views: 243
    ZASto
    12th September 2019, 08:20 Go to last post

  4. Lamp Test Circuit with some other indications.

    Started by imranahmed, 7th September 2019 23:46
    2 Attachment(s)
    • Replies: 15
    • Views: 760
    barry
    11th September 2019, 21:37 Go to last post

  5. Shunt in DC ammeter circuit

    Started by imranahmed, 9th September 2019 20:48
    4 Attachment(s)
    • Replies: 7
    • Views: 300
    imranahmed
    11th September 2019, 11:22 Go to last post

  6. Halogen Lamp Limit Resistor?

    Started by i200yrs, 7th August 2019 09:29
    2 Pages •
    1 2
    1 Attachment(s)
    • Replies: 20
    • Views: 1,413
    i200yrs
    4th September 2019, 09:08 Go to last post

  7. SmartScope ZIP 250 Z-axis

    Started by Veketti, 21st August 2019 19:08
    3 Attachment(s)
    • Replies: 2
    • Views: 776
    Veketti
    1st September 2019, 11:39 Go to last post

  8. [SOLVED] Identify Replacement Capacitor

    Started by CER8ERU5, 26th August 2019 12:23
    1 Attachment(s)
    • Replies: 3
    • Views: 514
    betwixt
    26th August 2019, 16:23 Go to last post

  9. Extend life of UV lamp.

    Started by i200yrs, 26th August 2019 05:07
    • Replies: 4
    • Views: 269
    ZASto
    26th August 2019, 14:04 Go to last post

  10. Electronic Load Circuit for 380 Vdc (2A to 3A) Power Supply

    Started by i200yrs, 22nd August 2019 04:56
    • Replies: 6
    • Views: 420
    i200yrs
    26th August 2019, 05:05 Go to last post

  11. IFC TG179 TO-92 (transistor)

    Started by i200yrs, 29th July 2019 07:44
    3 Attachment(s)
    • Replies: 5
    • Views: 678
    i200yrs
    26th August 2019, 05:00 Go to last post

  12. 450w ATX smps switching voltage low

    Started by dey4su, 21st August 2019 10:23
    • Replies: 8
    • Views: 590
    dey4su
    25th August 2019, 20:45 Go to last post

  13. How to fix Coax Cable of Vector Network Analyzer?

    Started by swadesh07, 23rd August 2019 20:44
    • Replies: 1
    • Views: 186
    BigBoss
    23rd August 2019, 21:50 Go to last post

  14. HP 54520A Blown Fuse Problem

    Started by neazoi, 7th January 2019 12:22
    2 Pages •
    1 2
    5 Attachment(s)
    • Replies: 32
    • Views: 1,524
    neazoi
    23rd August 2019, 19:47 Go to last post

  15. TTL to USB converter : RS232 to TRS

    Started by BobSan, 27th July 2019 18:02
    6 Attachment(s)
    • Replies: 8
    • Views: 698
    BobSan
    20th August 2019, 14:35 Go to last post

  16. Panel Mount NVIS LED Vendors name for Aerospace Application

    Started by AzharElectronics, 19th August 2019 16:24
    • Replies: 0
    • Views: 129
    AzharElectronics
    19th August 2019, 16:24 Go to last post

  17. How to build overcurrent/overvoltage protection

    Started by nurhidayah, 16th August 2019 10:18
    1 Attachment(s)
    • Replies: 1
    • Views: 316
    barry
    16th August 2019, 17:16 Go to last post

  18. Barudan BEDT - ZQ-501 Single Head - 8720 Control PCB

    Started by ServiceONE, 16th August 2019 02:45
    • Replies: 0
    • Views: 179
    ServiceONE
    16th August 2019, 02:45 Go to last post

  19. N7j3a marking transistor

    Started by hosseinhomerehe, 28th July 2019 05:53
    4 Attachment(s)
    • Replies: 6
    • Views: 853
    std_match
    14th August 2019, 09:50 Go to last post

  20. What Component is this

    Started by tdsflanked, 9th August 2019 13:15
    3 Attachment(s)
    • Replies: 1
    • Views: 326
    FvM
    9th August 2019, 16:41 Go to last post

  21. What might be wrong with this old piano?

    Started by fredand44, 28th July 2019 21:32
    7 Attachment(s)
    • Replies: 13
    • Views: 924
    fredand44
    8th August 2019, 21:20 Go to last post

  22. Soldering on Battery Terminals

    Started by joniengr, 12th July 2019 11:38
    • Replies: 11
    • Views: 922
    c_mitra
    8th August 2019, 13:34 Go to last post

  23. OP07 circuit output voltage?

    Started by steve_rb, 3rd August 2019 14:07
    2 Pages •
    1 2
    7 Attachment(s)
    • Replies: 24
    • Views: 938
    steve_rb
    7th August 2019, 19:11 Go to last post

  24. This is a simple capacitor or it has a resistor inside it?

    Started by brunofunchas, 6th August 2019 17:12
    1 Attachment(s)
    • Replies: 3
    • Views: 275
    brunofunchas
    7th August 2019, 11:05 Go to last post

  25. Turbine Backup Overspeed Pickup Probe Extraction Tool

    Started by Akanimo, 5th August 2019 15:20
    • Replies: 3
    • Views: 368
    Akanimo
    7th August 2019, 08:24 Go to last post

  26. A measurement issue in Signal generator and Spectrum Analyzer

    Started by Anomis, 2nd August 2019 04:48
    1 Attachment(s)
    • Replies: 1
    • Views: 244
    BigBoss
    2nd August 2019, 06:00 Go to last post

  27. 13.9 V instead of 2.75 v, Which parts are failing?

    Started by steve_rb, 31st July 2019 10:44
    1 Attachment(s)
    • Replies: 3
    • Views: 409
    steve_rb
    1st August 2019, 09:52 Go to last post

  28. Old resistor value recognition

    Started by imranahmed, 28th July 2019 12:23
    2 Attachment(s)
    • Replies: 3
    • Views: 441
    FvM
    28th July 2019, 13:47 Go to last post

  29. Identify components with marking code 1624HV

    Started by davoud, 24th July 2019 09:10
    3 Attachment(s)
    • Replies: 4
    • Views: 784
    FvM
    28th July 2019, 09:53 Go to last post

  30. Possible water damage inside keyboard

    Started by adam5555, 23rd July 2019 14:34
    1 Attachment(s)
    • Replies: 2
    • Views: 336
    c_mitra
    24th July 2019, 02:43 Go to last post
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